In Exercises 5-8, the graph of a quadratic function is given. Write the function's equation, selecting from the following options. Ax) = x2 + 2x + 1 g(x) = x2 - 2x + 1 h(x ) = x2 - 1 i(x) = -x2 - 1 6. -NWA 4-3 X -2 3 4-3-2-11 1 2 3 4